Derivative Instruments (Details 4) (USD $) In Millions	3 Months Ended
Mar. 31, 2011	Mar. 31, 2010
Cash flow hedge gains and losses [Abstract]
Total change in OCI for period	$ (8)	$ 83
Interest Rate Contract [Member] \| Cash Flow Hedging [Member]
Cash flow hedge gains and losses [Abstract]
Derivatives - effective portion reclassified from AOCI to income	94	49
Hedge ineffectiveness recorded directly in income	3	3
Total income statement impact	97	52
Effective portion recorded in OCI	(31)	251
Total change in OCI for period	(125)	202
Foreign Exchange Contract [Member] \| Cash Flow Hedging [Member]
Cash flow hedge gains and losses [Abstract]
Derivatives - effective portion reclassified from AOCI to income	22	(52)
Hedge ineffectiveness recorded directly in income	0	0
Total income statement impact	22	(52)
Effective portion recorded in OCI	18	(112)
Total change in OCI for period	(4)	(60)
Cash Flow Hedging [Member]
Cash flow hedge gains and losses [Abstract]
Derivatives - effective portion reclassified from AOCI to income	116	(3)
Hedge ineffectiveness recorded directly in income	3	3
Total income statement impact	119	0
Effective portion recorded in OCI	(13)	139
Total change in OCI for period	$ (129)	$ 142

Cash flow hedge gains and losses.

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- Definition

The income statement location of the effective portion of net gain or loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 205G

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 44C

-Subparagraph b

-Clause 3

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- Definition

The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

+ References

+ Details

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- Definition

The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.

+ References

+ Details

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- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

+ Details

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- Definition

Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase (decrease) in deferred hedging gains or losses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 14, 17, 20, 26

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 31, 46

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

-Number 51

-Paragraph 38

-Subparagraph c(3)

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 133

-Paragraph 46

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 24

-Subparagraph b

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 130

-Paragraph 14, 17, 20, 24, 26

+ Details

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